NBCLA May 17, 2023 2:47 pm Let Me Explain: Monsoonal Moisture As the weather warms up, monsoonal moisture is a term you’ll hear more often. We explain what it means. US & World Videos 1:09 Construction worker killed in crash on 71 Freeway in Chino 5:00 Demonstrations disrupt classes at UCLA 0:52 Several people taken into custody at UCLA campus 2:36 Law enforcement officers on UCLA campus as students return 2:06 Brush fire burns in Sepulveda Basin